Risen by Eric Trant

Haunted by visions of a demonic angel and sold into servitude by his father, young Alberto battles to survive the horrors of a nineteenth century Sicilian sulfur mine.

Suffering merciless brutality, Alberto must save not only himself but his deformed older brother, both pawns in their father’s mad plan to overthrow a group of wealthy landowners.

Bound by a death-debt to his hunchback master, Alberto discovers a door the miners call Porta dell’Inferno, the Door to Hell, deep within the sulfur mines. When he learns the demon-angel of his dreams stalks the caverns beyond the door, Alberto realizes a strange fate has lured him and his brother to the gates leading to the underworld.

Now Alberto must face the creature from his visions and rise to become the man his father demands him to be, or remain forever trapped in a hellish world where none escape.

RT @glass_poetry I know I might be the worst at this, but since it's the two thousand and eighteenth year of the common era, can we eliminate from our lexicons the phrase "shameless self promotion"?
You did the thing. You should be proud and you should, without shame, promote the hell out of it.